ogre vs unpleasant person

ogre and unpleasant person both are nouns.

Word	Noun	Adjective	Verb	Adverb
ogre	Yes	No	No	No
unpleasant person	Yes	No	No	No

As nouns, unpleasant person is a hypernym of ogre; that is, unpleasant person is a word with a broader meaning than ogre:

Other hypernyms of ogre include disagreeable person.

ogre (noun)	unpleasant person (noun)
(folklore) a giant who likes to eat human beings	a person who is not pleasant or agreeable
a cruel wicked and inhuman person